Cluster headaches were found to be more likely in spring and fall, with attacks generally occurring between late night and early morning.
Notes on verification
Confirmed by a 2023 Neurology meta-analysis and corroborated by AAN press release, News-Medical, Psychiatrist.com, and additional clinical sources (Mayo Clinic, Cleveland Clinic, Migraine Trust). Consistent findings across independent sources with no contradictions. [tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Migraine and Cluster Headaches are Linked to the Body's Internal ... (seed:health_and_medicine)
- https://www.aan.com/PressRoom/Home/PressRelease/5067 (corroboration)
- https://www.news-medical.net/news/20230329/Cluster-headache-and-migraine-are-stronly-linked-to-the-circadian-system.aspx (corroboration)
- https://www.psychiatrist.com/news/circadian-rhythms-bring-on-headache-blues-study-finds/ (corroboration)